My mother’s house used a cuckoo sound: when it was dinner time, her mom would summon the kids home with the loudest of cuckoos that could be heard for blocks around. Kids who didn’t present for dinner … didn’t get dinner.

This has become a running joke even amongst us grandkids, and the cousins all joke about it. But when I was on the other side of a LONG ferry queue (reminiscient of a wally-world parking lot) I heard the lilting tones on the wind of a far-off ‘cuc-koooooo’ and there was the (ex-army, some related voice-training) sibing waving enthusiastically.